The new and improved (import) can handle all cases import-as and
import-from did, so drop the latter two from the language. To do this,
the import builtin had to be changed a little: if there's a single
import statement to return, return it as-is, otherwise return a list of
imports.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
This also fixes a bug in the pass optimize missing branch where the code is
something like: [stmt, [], stmt]; in such case we want to filter out [], so
if we end up with [] we can optimize it. This fix is needed otherwise (do)
inside (do) are not properly optimized.
Signed-off-by: Julien Danjou <julien@danjou.info>
With these changes, the import function will become a lot smarter, and
will combine all of import, import-from and import-as in a hyly lispy
syntax:
(import sys os whatever_else)
(import [sys [exit argv]] [os :as real_os]
[whatever_else [some_function :as sf]])
That is, each argument of import can be:
- A plain symbol, which will be imported
- A list, which will be handled specially
If the argument is a list, the first element will always be the module
name to import, the second member can be either of these:
- A list of symbols to import
- The ':as' keyword
- Nothing
If it is the ':as' keyword, the third argument must be an alias. If it
is a list of symbols to import, we'll iterate through that list too. If
any symbol is followed by an ':as' keyword, we'll pick all three, and
treat the third member as an alias. If there is nothing else in the
list, we'll import the module as-is.
All this combined fixes#113.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
Fixes#106
Note: This is implemented by replacing all calls to Python's
builtin "compile" function by calls to hy.importer.compile_,
which adds the "future division" flag. Anyone using "compile"
in future work will have to remember this.
This implements keywords, ":" prefixed symbols that are able to look
themselves up in a collection. They're internally stored as strings that
start with "\ufdd0".
This fixes#22.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
